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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0402119 (2012-02-22) |
등록번호 | US-8603296 (2013-12-10) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 5 인용 특허 : 291 |
A method of making a fabric-creped absorbent cellulosic sheet with improved dispensing characteristics. The method includes compactively dewatering a papermaking furnish to form a nascent web, applying the nascent web to a translating transfer surface, fabric-creping the web from the transfer surfac
A method of making a fabric-creped absorbent cellulosic sheet with improved dispensing characteristics. The method includes compactively dewatering a papermaking furnish to form a nascent web, applying the nascent web to a translating transfer surface, fabric-creping the web from the transfer surface at a consistency of from about 30 to about 60 percent utilizing a patterned creping fabric, the fabric-creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric, wherein the fabric is traveling at a fabric speed that is slower than the speed of the transfer surface, the web being creped from the transfer surface and transferred to the creping fabric, adhering the web to a drying cylinder with a resinous adhesive coating composition, drying the web on the drying cylinder to form a dried web, and peeling the dried web from the drying cylinder.
1. A method of making a fabric-creped absorbent cellulosic sheet with improved dispensing characteristics, the method comprising: (a) compactively dewatering a papermaking furnish to form a nascent web, the nascent web having a consistency of from about 30 percent to about 60 percent;(b) applying th
1. A method of making a fabric-creped absorbent cellulosic sheet with improved dispensing characteristics, the method comprising: (a) compactively dewatering a papermaking furnish to form a nascent web, the nascent web having a consistency of from about 30 percent to about 60 percent;(b) applying the nascent web to a translating transfer surface that is moving at a transfer surface speed;(c) fabric-creping the nascent web under pressure in a fabric creping nip defined between the transfer surface and a patterned creping fabric by transferring the nascent web from the transfer surface to the creping fabric to form a creped web, the patterned creping fabric traveling at a fabric speed that is lower than the transfer surface speed, the nascent web being creped from the transfer surface and redistributed on the patterned creping fabric to form the creped web, such that the creped web has a plurality of elongated densified regions of compressed papermaking fibers, the elongated densified regions being generally oriented along a machine direction (MD) of the creped web;(d) adhering the creped web to a drying cylinder with a resinous adhesive coating composition;(e) drying the creped web on the drying cylinder to form a dried web;(f) peeling the dried web from the drying cylinder to produce a fabric-creped absorbent cellulosic sheet; and(g) selecting the papermaking furnish, the creping fabric, the resinous adhesive coating, the fabric speed, the transfer surface speed, nip parameters of the fabric creping nip, and the nascent web consistency to provide the cellulosic sheet with a desired machine direction (MD) bending length. 2. The method according to claim 1, wherein the machine direction (MD) bending length of the cellulosic sheet is from about 3.5 cm to about 5 cm. 3. The method according to claim 1, wherein the machine direction (MD) bending length of the cellulosic sheet is from about 3.75 cm to about 4.5 cm. 4. The method according to claim 1, wherein the fabric-creping step is operated at a fabric crepe of from about 3.5% to about 30%. 5. The method according to claim 1, wherein the fabric-creping step is operated at a fabric crepe of from about 2% to about 15%. 6. The method according to claim 1, wherein the cellulosic sheet exhibits a water absorption rate (WAR) value of less than about 35 seconds. 7. The method according to claim 1, wherein the cellulosic sheet exhibits a water absorption rate (WAR) value of less than about 30 seconds. 8. The method according to claim 1, wherein the cellulosic sheet exhibits a water absorption rate (WAR) value of from about 10 to about 25 seconds. 9. The method according to claim 1, wherein the papermaking furnish comprises a wet strength resin. 10. The method according to claim 1, wherein the papermaking furnish comprises a dry strength resin. 11. The method according to claim 1, wherein the papermaking furnish comprises a wet strength resin and a dry strength resin selected from the group consisting of carboxymethyl cellulose, polyacrylamides, and mixtures thereof. 12. The method according to claim 11, wherein the wet strength resin add-on rate is less than twenty pounds per ton of papermaking fiber. 13. The method according to claim 1, wherein the resinous adhesive coating composition is applied at an add-on rate of less than about 40 mg/m2. 14. The method according to claim 1, wherein the resinous adhesive coating composition is applied at an add-on rate of less than about 35 mg/m2. 15. The method according to claim 1, wherein the resinous adhesive coating composition is applied at an add-on rate of less than about 25 mg/m2. 16. The method according to claim 1, wherein the resinous adhesive coating composition is applied at an add-on rate of less than about 20 mg/m2. 17. The method according to claim 1, wherein the resinous adhesive coating composition is applied at an add-on rate of less than about 10 mg/m2. 18. The method according to claim 1, wherein the resinous adhesive composition consists essentially of a polyvinyl alcohol resin and a polyamide-epichlorohydrin resin. 19. The method according to claim 18, wherein the weight ratio of polyvinyl alcohol resin to polyamide-epichlorohydrin resin is from about two to about four. 20. The method according to claim 1, wherein the papermaking furnish comprises prepared fiber that is predominantly softwood pulp. 21. The method according to claim 20, wherein the softwood pulp is predominantly Douglas Fir pulp. 22. The method according to claim 1, wherein the papermaking furnish comprises papermaking fiber that is at least 25% by weight Douglas Fir fiber. 23. The method according to claim 1, wherein the papermaking furnish comprises papermaking fiber that is at least 40% by weight Douglas Fir fiber. 24. The method according to claim 1, wherein the papermaking furnish comprises papermaking fiber that is at least 50% by weight Douglas Fir fiber. 25. The method according to claim 1, wherein the papermaking furnish comprises papermaking fiber that includes recycle pulp. 26. The method according to claim 1, wherein the papermaking furnish comprises papermaking fiber that is at least 25% by weight recycle fiber. 27. The method according to claim 1, wherein the papermaking furnish comprises papermaking fiber that is at least 40% by weight recycle fiber. 28. The method according to claim 1, wherein the papermaking furnish comprises papermaking fiber that is at least 50% by weight recycle fiber. 29. The method according to claim 1, wherein the papermaking furnish comprises papermaking fiber that is at least 25% by weight recycle fiber and at least 25% by weight Douglas Fir fiber. 30. The process according to claim 1, further comprising on-line calendering the web with a calender stack prior to winding the web on a reel. 31. The process according to claim 30, wherein the calender stack is synchronized with the reel prior to loading the calender stack. 32. The method according to claim 30, further comprising tensioning the web between the drying cylinder and the calender stack. 33. The method according to claim 32, wherein the web is tensioned between the drying cylinder and the calender stack with a spreader bar. 34. The method according to claim 32, wherein the web is tensioned between the drying cylinder and the calender stack with a bow roll. 35. The method according to claim 30, further comprising tensioning the web between the calender stack and the reel. 36. The method according to claim 1, wherein the fabric-creping step takes place under a pressure of from about 20 to about 200 pounds per linear inch. 37. The method according to claim 1, wherein the fabric-creping step takes place under a pressure of from about 40 to about 70 pounds per linear inch. 38. The method according to claim 1, wherein the step of compactively dewatering the papermaking furnish forms the nascent web such that the nascent web has an apparently random distribution of papermaking fiber. 39. The method according to claim 1, wherein the nascent web applied to the translating transfer surface in the applying step has an apparently random distribution of papermaking fibers. 40. A method of making a fabric-creped absorbent cellulosic sheet with improved dispensing characteristics, the method comprising: (a) compactively dewatering a papermaking furnish to form a nascent web, the nascent web having a consistency of from about 30 percent to about 60 percent;(b) applying the nascent web to a translating transfer surface that is moving at a transfer surface speed;(c) fabric-creping the nascent web under pressure in a fabric creping nip defined between the transfer surface and a patterned creping fabric by transferring the nascent web from the transfer surface to the creping fabric to form a creped web, the patterned creping fabric traveling at a fabric speed that lower than the transfer surface speed, the fabric crepe being from about 2% to about 15%, and the nascent web being creped from the transfer surface and redistributed on the patterned creping fabric to form the creped web, such that the creped web has a plurality of elongated densified regions of compressed papermaking fibers, the elongated densified regions being generally oriented along a machine direction (MD) of the creped web;(d) adhering the creped web to a drying cylinder with a resinous adhesive coating composition;(e) drying the creped web on the drying cylinder to form a dried web;(f) peeling the dried web from the drying cylinder to produce a fabric-creped absorbent cellulosic sheet; and(g) selecting the papermaking furnish, the creping fabric, the resinous adhesive coating, the fabric speed, the transfer surface speed, nip parameters of the fabric creping nip, and the nascent web consistency such that the cellulosic sheet exhibits a predetermined water absorption rate (WAR). 41. The method according to claim 40, wherein the fabric-creping step takes place under a pressure of from about 20 to about 200 pounds per linear inch. 42. The method according to claim 40, wherein the fabric-creping step takes place under a pressure of from about 40 to about 70 pounds per linear inch. 43. A method of making a fabric-creped absorbent cellulosic sheet with improved dispensing characteristics, the method comprising: (a) compactively dewatering a papermaking furnish to form a nascent web, the nascent web having a consistency of from about 30 percent to about 60 percent;(b) applying the nascent web to a translating transfer surface that is moving at a transfer surface speed;(c) fabric-creping the nascent web under pressure in a fabric creping nip defined between the transfer surface and a patterned creping fabric by transferring the nascent web from the transfer surface to the creping fabric to form a creped web, the patterned creping fabric traveling at a fabric speed that is lower than the transfer surface speed, the fabric crepe being from about 2% to about 15%, and the nascent web being creped from the transfer surface and redistributed on the patterned creping fabric to form the creped web, such that the creped web has a plurality of elongated densified regions of compressed papermaking fibers, the elongated densified regions being generally oriented along a machine direction (MD) of the creped web;(d) adhering the web to a drying cylinder with a resinous adhesive coating composition;(e) drying the web on the drying cylinder to form a dried web;(f) peeling the dried web from the drying cylinder to produce a fabric-creped absorbent cellulosic sheet; and(g) selecting the papermaking furnish, the creping fabric, the resinous adhesive coating, the fabric speed, the transfer surface speed, the fabric creping nip parameters, and the nascent web consistency to provide the cellulosic sheet with a predetermined absorbency. 44. The method according to claim 43, wherein the cellulosic sheet has an absorbency of at least about 3.5 g/g. 45. The method according to claim 43, wherein the cellulosic sheet has an absorbency of at least about 4 g/g. 46. The method according to claim 43, wherein the cellulosic sheet has an absorbency of at least about 4.5 g/g. 47. The method according to claim 43, wherein the cellulosic sheet has an absorbency of at least about 5 g/g. 48. The method according to claim 43, wherein the cellulosic sheet has an absorbency of at least about 5.5 g/g. 49. The method according to claim 43, wherein the fabric-creping step takes place under a pressure of from about 20 to about 200 pounds per linear inch. 50. The method according to claim 43, wherein the fabric-creping step takes place under a pressure of from about 40 to about 70 pounds per linear inch. 51. A method of making a fabric-creped absorbent cellulosic sheet with improved dispensing characteristics, the method comprising: (a) compactively dewatering a papermaking furnish to form a nascent web, the nascent web having a consistency of from about 30 percent to about 60 percent;(b) applying the nascent web to a translating transfer surface that is moving at a transfer surface speed;(c) fabric-creping the nascent web under a pressure of from about 20 to about 200 pounds per linear inch in a fabric creping nip defined between the transfer surface and a patterned creping fabric by transferring the nascent web from the transfer surface to the creping fabric to form a creped web, the patterned creping fabric traveling at a fabric speed that lower than the transfer surface speed, the nascent web being creped from the transfer surface and redistributed on the patterned creping fabric to form the creped web, such that the creped web has a plurality of elongated densified regions of compressed papermaking fibers, the elongated densified regions being generally oriented along a machine direction (MD) of the creped web;(d) adhering the creped web to a drying cylinder with a resinous adhesive coating composition;(e) drying the creped web on the drying cylinder to form a dried web;(f) peeling the dried web from the drying cylinder; and(g) stabilizing the dried web utilizing an airfoil with a rounded edge in proximity to the drying cylinder. 52. The method according to claim 51, further comprising stabilizing the dried web over an open draw utilizing at least one air foil. 53. The method according to claim 51, further comprising using at least two additional air foils to stabilize the dried web. 54. The method according to claim 51, further comprising on-line calendering the web with a calender stack located between the drying cylinder and a wind-up reel. 55. The method according to claim 54, wherein the calender stack is synchronized with the wind-up reel prior to loading the calender stack. 56. The method according to claim 51, wherein the fabric-creping step takes place under a pressure of from about 40 to about 70 pounds per linear inch.
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